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Catalyst layer, membrane electrode assembly, and polyelectrolyte fuel cell

a fuel cell and membrane electrode technology, applied in the direction of fuel cells, cell components, electrical equipment, etc., to achieve the effect of high power generation performance and excellent substance transport properties

Active Publication Date: 2021-01-14
TOPPAN PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a catalyst layer with improved substance transport properties for a long period of high power generation performance in a polyelectrolyte fuel cell.

Problems solved by technology

Problems with practical use are, for example, how to improve cell performances such as power-generating characteristics and durability, to build infrastructure, and to reduce production costs.

Method used

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  • Catalyst layer, membrane electrode assembly, and polyelectrolyte fuel cell
  • Catalyst layer, membrane electrode assembly, and polyelectrolyte fuel cell
  • Catalyst layer, membrane electrode assembly, and polyelectrolyte fuel cell

Examples

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examples

[0079]Examples and comparative examples will now be described.

[0080][Preparation of Membrane Electrode Assembly]

[0081]Membrane electrode assemblies according to Examples 1 to 5 and Comparative Examples 1 to 5 were prepared by the following method.

[0082]In Example 1, a platinum-on-carbon catalyst (TEC10E50E manufactured by Tanaka Kikinzoku Kogyo K.K.), water, 1-propanol, polyelectrolyte (Nafion (registered trademark) dispersed liquid manufactured by Wako Pure Chemical Industries, Ltd.), and carbon nanofibers (VGCF-H (registered trademark) manufactured by Showa Denko K.K.) were mixed. The platinum-on-carbon catalyst is a platinum catalyst supported on carbon particles. The blending ratio of the carbon particles to the polyelectrolyte was 1:1 by mass ratio. The mixture was dispersed in a planetary ball mill at 300 rpm for 60 minutes to prepare a catalyst ink. At this time, zirconia balls having a diameter of 5 mm were added to the mixture. The amount of the zirconia balls added was abo...

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Abstract

A catalyst layer comprising an interface to a polyelectrolyte membrane, the catalyst layer includes a layer forming material, which includes a catalytic substance, a conductive carrier which supports the catalytic substance, a polyelectrolyte, and a fibrous material, and a plurality of pores which contain no layer forming material. A pore area ratio which is a total area ratio of the plurality of pores to an area of a cross-section orthogonal to the interface is 25.0% or more and 35.0% or less in a cross-sectional image captured by a scanning electron microscope.

Description

CROSS-REFERENCE TO RELATED PATENT APPLICATIONS[0001]This application is a continuation application filed under 35 U.S.C. § 111(a) claiming the benefit under 35 U.S.C. §§ 120 and 365(c) of International Patent Application No. PCT / JP2019 / 014349, filed on Mar. 29, 2019, which is based upon and claims the benefit of priority to Japanese Patent Application No. 2018-069438, filed on Mar. 30, 2018, the disclosures of which are all incorporated herein by reference in their entireties.BACKGROUNDTechnical Field[0002]The present invention relates to a catalyst layer, a membrane electrode assembly, and a polyelectrolyte fuel cell.Background Art[0003]Fuel cells are power generation systems that produce electricity through chemical reactions of hydrogen and oxygen. The fuel cells have features such as high efficiency, low environmental burden, and low noise compared with other conventional power generation systems and have received attention as clean energy sources. In particular, polyelectrolyte...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01M4/86H01M8/1004
CPCH01M4/8626H01M2008/1095H01M4/8673H01M8/1004Y02E60/50H01M4/926H01M4/8605
Inventor OZAWA, MADOKA
Owner TOPPAN PRINTING CO LTD
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